[infinispan-issues] [JBoss JIRA] (ISPN-8241) Refactor RocksDB clearThreshold

[Ryan Emerson (JIRA)]

Ryan Emerson created ISPN-8241:
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             Summary: Refactor RocksDB clearThreshold
                 Key: ISPN-8241
                 URL: https://issues.jboss.org/browse/ISPN-8241
             Project: Infinispan
          Issue Type: Sub-task
            Reporter: Ryan Emerson
            Assignee: Ryan Emerson


Currently the RocksDB store utilises a "clearThreshold" to try to delete entries individually before deleting and re-initiating the database. We should deprecate this threshold and always delete/reinit the database. 

Currently when deleting the database, we utilise Util.recursiveFileRemove which does not confirm that the file has actually been deleted. Instead, we should provide a nio based implementation instead, similar to the one stated [here|https://stackoverflow.com/questions/779519/delete-directories-recursively-in-java/27917071#27917071]. This has the advantage that an IOException is thrown by java.nio.file.Files::delete



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